/*
     const指针演示
*/
#include <stdio.h>
int main() {
    int num = 0;
    const int *p_num = &num;
    int * const p_num1 = &num;
    //*p_num = 10;   错误
    p_num = NULL;
    *p_num1 = 10;
    //p_num = NULL;  错误
    return 0;
}
